“However, the outcome could have been very different. Had North Wales Fire and Rescue Service not been in attendance and been able to alert the occupants they could have easily become trapped in the property.”

He criticised the absence of smoke alarms at the property.

A North Wales Police spokeswoman said that door-to-door inquiries were being held.

Anyone with information is asked to contact Colwyn Bay police on 0845 607 1001/2 or Crimestoppers on 0800 555111.